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Abstract

Effect pigments consisting of platy substrates such as mica, borosilicate flakes or Al203 flakes, which have been encapsulated with magnetic forms of cobalt oxides and/or cobalt ferrites, can yield very unique three-dimensional effects when utilized in the presence of magnetic fields, electromagnetic and electrostatic radiation, and radio frequency signals.

Copyright

Engelhard Corporation 9/27/02

Country

United States

Language

English (United States)

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This is the abbreviated version, containing approximately
50% of the total text.

Creating
Unique Effects With Cobalt Oxide Effect Pigments

Effect
pigments consisting of platy substrates such as mica, borosilicate flakes or Al203
flakes, which have been encapsulated with magnetic forms of cobalt oxides
and/or cobalt ferrites, can yield very unique three-dimensional effects when
utilized in the presence of magnetic fields, electromagnetic and electrostatic
radiation, and radio frequency signals.

For
example, when platelets of muscovite mica having a average platelet size of
about 17.8 mm (major dimension) which
have been encapsulated with about 23% CoFe204 and about
3.5% Co304 were incorporated in an automotive paint
system with a ­­­­­­­­­­pigment to binder ratio of 0.2 and sprayed onto the
Brady Chips (3x6 cm Aluminum panels) in the presence of a magnetic field, some
very unique three dimensional effects were observed.�

Different
color effects can be obtained by incorporating coloring pigments in the
formulation along with the magnetic pigment such as Carbon Black, Quinacridone
Red, Phthalocyanine Blue and/or pearlescent/interference pigments with
reflection colors such as gold, red, blue and green in the paint formulation.

Variations
in the effects observed can be obtained by varying the strength of the magnetic
field, or other electromagnetic interactions.

Engelhard seeks to present
reliable information concerning the composition, properties and use of its
products and services, however; (1) All advice concerning selection and use
of any products or services is provided AT NO CHARGE AND WITH NO WARRANTY,
(2) No warranty is made hereby; products and services described herein are
warranted to conform to Engelha...